AutoTune for Motorola APX Series Radios User Guide
56
6.20. Voice Modulation (internal)
Note
: Motorola APX Mobile High Power models are not supported for this test.
The purpose of this procedure is to test the ability of the radio’s external microphone
audio circuit to accurately transfer the received microphone signal.
RF Control Port
Frequency
Modulation Attenuation
Monitor
RF IN/OUT Test Frequency FM
40 dB
Table 6-38. Analyzer Configuration for Voice Modulation (internal) test
6.20.1. Test
The radio is placed into Test Mode at the lowest TX Test Frequency. The analyzer is
setup as specified in this section’s Analyzer Configuration table. The user is instructed
to key the connected radio microphone and place the microphone next to the analyzer
speaker (see Figure 6-2). The user is also instructed to adjust the analyzer volume until
about 60% rated system deviation is seen on the analyzer display (see Figure 6-3). The
deviation level is then measured by the analyzer and the user is instructed when to un-
key the microphone. The measured deviation is compared against test limits and the
final results are written to the log file.
Figure 6-2. Place keyed microphone next to analyzer speaker.
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